.ct_btn {
  padding: 3px;
  margin-right: 10px;
}
.ct_btn2 {
  padding: 0 3px;
  margin-right: 10px;
}
td {
  height: 100%;
}
.ct_div {
  display: flex;
  align-content: center;
  align-items: center;
  height: 25px;
  width: 40px;
}
tr > td > .ct_div > .ct_btn {
  display: none;
}
tr:hover > td > .ct_div > .ct_btn {
  display: block;
}
